Data coming from a POST or GET is a string, by definition -- A URL just
doens't contain any data type information, and PHP isn't going to sit there
and try to guess what the data type of $x should be.
You'll need to check its validity as an integer by using something like
this:
if (strlen($quantity) && ((int) $quantity == (string) $quantity)) &&
$quantity){
}
else{
$quantity = 1;
}
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----- Original Message -----
From: Joseph H Blythe <[EMAIL PROTECTED]>
Newsgroups: php.general
Sent: Thursday, February 15, 2001 7:32 PM
Subject: [PHP] checking to see if value is a integer from a form text field
> hey,
>
> I have a strange problem, when a user inputs the quantity into a text
input field in a cart, I want to be able to test to see if the value is a
integer if it isn't then default it to 1
>
> if ( !is_int($Qty) ) {
> $Qty = 1;
> }
>
> Looks ok, should work in theory, but it doesn't if I use this test, the
update on the database fails, take it out and it works, so if a user was to
type "f" in the quantity field in the cart and hit update because the
quantity field is int(2) in the database it will default to 0 which I do not
want. I have also tried to set the type before the update like so:
>
> $Qty = settype($Qty, "integer");
>
> This also will make the update fail, how would I make sure a user does not
type characters in the quantity field without using javascript or ereg
stuff to check the values? I just want to default the quantity to 1 if a
invailid quantity is inputted.
>
> If there is no obvious soulution then I will use a piece of javascript to
check the field onSubmit for illegal characters and alert the user I guess.
>
> Regards,
>
> Joseph
>
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